Allen-Bradley ControlNet PLC-5 User Manual page 70

2-30 Planning to Use Your ControlNet PLC-5 Processor
2-slot addressing
16-point modules
1785-UM022B-EN-P - February 2002
However, the overall system may be heavy on inputs, and there are no
concerns about the output image table. In this case you may want to
conserve the input image table for this chassis and arrange it as
follows:
ACN I I I I
When deciding when, where, and what type of optimization to use,
you have to balance:
• space limitations
• additional costs (extra chassis, adapters, etc.)
• I/O image table availability
• future expansion
I I O O
I = Discrete Input Module
O = Discrete Output Module
ACN = ControlNet adapter